body,html{
    width: 100%;
    height: 100%;
    padding: 0;
    margin: 0;
    overflow: hidden;
}
.box{
    display: flex;
    width: 100%;
    height: 100%;
}
#main{
    flex: 3;
    width: 0;
}

#card{
    /* flex: 1; */
    display: flex;
    flex-direction: column;
}
#card div{
    flex: 1;
}
#hidebar{
    display: flex;
    border: #bbb solid 1px;
    width: 8px;
    margin-right: 20px;
    margin-left: 3px;
}
#showbar{
    display: flex;
    border: #bbb solid 1px;
    width: 8px;
    margin-right: 3px;
    margin-left: 3px;
}
.hidebtn{
    color: #bbb;
    border: 1px solid #bbb;
    border-radius: 10% 30% 30% 10%;
    align-self: center;
    padding: 20px 2px;
    user-select: none;
    margin-left: -3px;
    background: white;
    font-size: 16px;
}
.showbtn{
    color: #bbb;
    border: 1px solid #bbb;
    border-radius: 30% 10% 10% 30%;
    align-self: center;
    padding: 20px 2px;
    user-select: none;
    margin-left: -4px;
    background: white;
    font-size: 16px;
}
#hidbar:hover{
    background: #eee;
}
.hidbtn:hover{
    background: #eee;
    cursor: pointer;
}
#cover{
    position: absolute;
    left: 0;
    right: 0;
    top: 0;
    bottom: 0;
    background: #0008;
    display: flex;
    cursor: wait;
}
#cover label{
    flex: 1;
    text-align: center;
    align-self: center;
}